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Phase 3 N=750 Randomized Quadruple-blind Treatment

Pregnancy in Polycystic Ovary Syndrome II

Pregnancy · Polycystic Ovary Syndrome

Enrolled (actual)
750
Serious AEs
4.5%
Results posted
Jun 2014
Primary outcome: Primary: Live Birth — 72; 103 Participants — p=0.007

Study Design & Population

Study type
Interventional
Phase
Phase 3
Interventions
Clomiphene citrate (Drug); Letrozole (Drug)
Age
Adult · 18+ yrs
Sex
Female
Sponsor
Yale University
Primary completion
May 2013

Outcome Measures

OutcomeResultp-value
PRIMARY
Live Birth
72; 103 0.007 sig
SECONDARY
Number of Pregnancy
103; 154
SECONDARY
Number of Ovulations
331; 388
SECONDARY
Number of Serious Adverse Events
13; 22
SECONDARY
Neonatal Complication Rate
17; 27; 2; 7; 4; 4

Summary

The primary research hypothesis is that ovulation induction with an aromatase inhibitor (letrozole) is more likely to result in live birth than ovulation induction with a selective estrogen receptor modulator (clomiphene citrate) in infertile women with PCOS. A safety hypothesis will also be incorporated into the primary research hypothesis in which we hypothesize both treatments are equally safe for mother and child. Secondary research hypotheses include: 1. Treatment with letrozole is more likely to result in singleton pregnancy compared to treatment with clomiphene citrate. Singleton pregnancy is defined as presence of a single intrauterine gestational sac with a single fetal pole and observable heart motion. 2. Treatment with letrozole will less likely result in a first trimester intrauterine fetal demise than treatment with clomiphene citrate. A first trimester IUFD is defined as a pregnancy that ends before 13 weeks gestation. 3. Treatment with letrozole is more likely to result in ovulation (increased ovulation rate) compared to treatment with clomiphene citrate. Ovulation is defined as a midluteal progesterone level ≥ 3 ng/mL. 4. The shortest time to pregnancy will be with letrozole. 5. Age, body mass index, SHBG, testosterone, LH, Anti-Mullerian Hormone (AMH), and degree of hirsutism and acne will be significant predictors of ovulation and conception regardless of treatment. 6. Improvement in SHBG, testosterone, AMH, and LH levels will be significant predictors of ovulation and conception regardless of treatment. 7. DNA polymorphisms in estrogen action genes will predict response to study drug. 8. Quality of Life will be better on letrozole than clomiphene. 9. Letrozole will be more cost effective at achieving singleton pregnancies than clomiphene.

Eligibility Criteria

Inclusion Criteria

Key Inclusion Criteria (Must have ovulatory dysfunction and either hyperandrogenism or PCO)

  • Chronic anovulation or oligomenorrhea: defined as spontaneous intermenstrual periods of ≥45 days or a total of ≤8 menses per year, or for women with suspected anovulatory bleeding, a midluteal serum progesterone level 8 at screening exam (Hatch, Rosenfield et al. 1981 Aug 1). Subjects who have hirsutism do not need local or core labs documenting elevated androgen levels.
  • Hyperandrogenemia can be determined from local labs. Local cutoffs will be pre-determined by each site prior to study initiation. Hyperandrogenemia will be defined as an elevated total testosterone, or free androgen index (FAI)(in our lab at Penn State College of Medicine a total T > 50 ng/dL or a free androgen index >5) will allow entry into the study (Legro, Driscoll et al. 1998). The FAI is calculated from measurable values for total T and SHBG, as previously described (Miller, Rosner et al. 2004), using the following equation: (FAI = Total testosterone in nmol/L / SHBG in nmol/L) X 100. Outside lab values obtained within the last year documenting elevated T or FAI levels are sufficient to meet criteria of hyperandrogenemia.
  • Polycystic Ovaries on Ultrasound: We will use the revised Rotterdam criteria for diagnosing polycystic ovaries (Balen, Laven et al. 2003). PCO will be defined as either an ovary that contains 12 or more follicles measuring 2-9 mm in diameter, or an increased ovarian volume (> 10 cm3) on one ovary for entry into the study. If there is a follicle > 10 mm in diameter, the scan should be repeated at a time of ovarian quiescence in order to calculate volume and area if the subject does not otherwise qualify for the study. The presence of a single polycystic ovary (PCO), either by volume or morphology, is sufficient to provide the diagnosis.

Exclusion Criteria

We will exclude subjects with medical conditions that represent contraindications to CC, aromatase inhibitors and/or pregnancy or who are unable to comply with the study procedures. We will exclude subjects with poorly controlled Type I or Type II diabetes; undiagnosed liver disease or dysfunction (based on serum liver enzyme testing); renal disease or abnormal serum renal function; significant anemia; history of deep venous thrombosis, pulmonary embolus, or cerebrovascular accident; uncontrolled hypertension, known symptomatic heart disease; history of or suspected cervical carcinoma, endometrial carcinoma, or breast carcinoma; undiagnosed vaginal bleeding, and use of other medications known to affect reproductive function or metabolism (e.g., OCP, GnRH agonists and antagonists, antiandrogens, gonadotropins, anti-obesity drugs, somatostatin, diazoxide, ACE inhibitors, and calcium channel blockers). As in PPCOS we will allow a 2 months washout period for subjects who desire to participate and discontinue exclusionary medications (most commonly OCP, but also possibly metformin), and a period of observation or treatment for correctable conditions.

Couple Inclusion Criteria

  • Sperm concentration of 14 million/mL in at least one ejaculate within the last year, with at least some motile sperm.
  • Ability to have regular intercourse during the ovulation induction phase of the study.
  • At least one patent tube and normal uterine cavity as determined by sonohysterogram, hysterosalpingogram, or hysteroscopy/laparoscopy within the last 3 years. An uncomplicated intrauterine non-IVF pregnancy and uncomplicated delivery and postpartum course resulting in live birth within the last three years will also serve as sufficient evidence of a patent tube and normal uterine cavity as long as the subject did not have, during the pregnancy or subsequently, risk factors for Asherman's syndrome or tubal disease or other disorder leading to an increased suspicion for intrauterine abnormality or tubal occlusion.
  • No previous sterilization procedures (vasectomy, tubal ligation) that
View full record on ClinicalTrials.gov →

Data sourced from ClinicalTrials.gov (NCT00719186). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.

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